31120204543 has 2 divisors, whose sum is σ = 31120204544. Its totient is φ = 31120204542.

The previous prime is 31120204477. The next prime is 31120204561. The reversal of 31120204543 is 34540202113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31120204543 - 2¹⁷ = 31120073471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120264543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560102271 + 15560102272.

It is an arithmetic number, because the mean of its divisors is an integer number (15560102272).

Almost surely, 2^31120204543 is an apocalyptic number.

31120204543 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120204543 is an equidigital number, since it uses as much as digits as its factorization.

31120204543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31120204543 its reverse (34540202113), we get a palindrome (65660406656).

The spelling of 31120204543 in words is "thirty-one billion, one hundred twenty million, two hundred four thousand, five hundred forty-three".